Fusion and Refining

One of the most recent tendencies in the fusion and refining of gold, starting from the cathodes of wool of iron or of precipitates, is the introduction of the oven of induction which presents important advantages over the traditional ore ovens or the basculant ovens. It is characterized for being compact, very clean, for reaching high temperatures, being easy to control, quick for starting and ending trustworthily, and for producing few products of combustion and small volumes of gasses. The only disadvantage possibly found is its high cost.

The other important development is the oven TBRC (Top Blown Rotary Converter), fabricated by theTolltreck firm. This is a cylindric, rotational and inclinable oven, redressed of refractories in which the burners and gaseous reactives can be introduced by the mouth without the necessity of submerged lances or tuyere. The gasses of reaction are intaken in a bell.

 It presents great advantages due to its versatility for the fusion and rifining of various materials which contain precious metals, from minerals, concentrates, precipitates, anodic clay, cleaning of scoriae,conversion of axels, etc. They can perform autogenous fusions when using oxygen, which also implies unlimited possibilities of oxydation. The agitation is very good and the rotation and the temperature can be controlled easily, the volume of gasses is small and concentrated, and is very simple in changing the cylinder of reaction.

Cimm counts with a pilot unit of 10 liters, provided with the additional equipment necessary. The Top Blown Rotary Converter (TBRC) has been used with much success in an industrial scale in the conversion of complex axels of nickel-cobalt and treatment of anodic clay of refineries of copper. Presently, a refinery of gold in Australia is found in construction which will be used as a central equipment for treating diverse materials of the primary and secondary extractive industry.